diff --git a/src/views/modules/labelSetting/LabelDesigner.vue b/src/views/modules/labelSetting/LabelDesigner.vue
index 8f72a03..76ec933 100644
--- a/src/views/modules/labelSetting/LabelDesigner.vue
+++ b/src/views/modules/labelSetting/LabelDesigner.vue
@@ -487,6 +487,10 @@ export default {
               if (element.showSerialNumber === undefined || element.showSerialNumber === null || element.showSerialNumber === '') {
                 element.showSerialNumber = false
               }
+              // 已从完整日期切到其他提取方式的历史数据，打开时清掉残留勾选，避免再次保存把后缀写回去。
+              if (element.dateExtractType && element.dateExtractType !== 'full') {
+                element.showSerialNumber = false
+              }
               if (element.digits === undefined || element.digits === null || element.digits === '') {
                 element.digits = 2
               }
diff --git a/src/views/modules/labelSetting/components/PropertyForm.vue b/src/views/modules/labelSetting/components/PropertyForm.vue
index ccd4578..65e7782 100644
--- a/src/views/modules/labelSetting/components/PropertyForm.vue
+++ b/src/views/modules/labelSetting/components/PropertyForm.vue
@@ -177,7 +177,7 @@
             </el-form-item>
 
             <el-form-item :label="$t('labelSetting.property.extractType')" class="form-item-half">
-              <el-select v-model="element.dateExtractType" size="mini" style="width: 100%;">
+              <el-select v-model="element.dateExtractType" size="mini" style="width: 100%;" @change="onDateExtractTypeChange">
                 <el-option :label="$t('labelSetting.property.fullDate')" value="full" />
                 <el-option :label="$t('labelSetting.property.extractYear')" value="year" />
                 <el-option :label="$t('labelSetting.property.extractMonth')" value="month" />
@@ -816,6 +816,13 @@ export default {
       }
     },
 
+    onDateExtractTypeChange(extractType) {
+      // 流水号后缀只在完整日期下可配置。切到年/月/日/周别等类型时取消勾选，避免隐藏状态被保存后继续拼到打印结果上。
+      if (extractType !== 'full') {
+        this.$set(this.element, 'showSerialNumber', false)
+      }
+    },
+
     onDataTypeChange(newType) {
       // 重置相关设置
       if (newType === 'date') {